Description
Overview:
The Spark Plug EMS (Champion QC12YC) is a genuine Briggs & Stratton service part designed to restore dependable ignition in small petrol engines used on garden and light construction equipment. Built with a robust metal shell and a high-strength ceramic insulator, it delivers a clean, consistent spark to ignite the air-fuel mixture for smooth starting and reliable running. It suits a wide range of Briggs & Stratton horizontal and vertical shaft engines found on lawn mowers, generators, pressure washers, tillers, compactors, and similar machines. This plug matches Briggs & Stratton specifications for heat range and fit, helping protect engine performance and fuel economy. OEM No. 691043 (replaces 499950). Compatible with many models including 10D132 and 10D135.
Key Features:
- Genuine Briggs & Stratton part for assured fit and function (OEM 691043; replaces 499950)
- Champion QC12YC specification for stable ignition and consistent performance
- Durable construction with a tough ceramic insulator and corrosion‐resistant shell
- Supports reliable cold starts and smooth running under varying loads
- Correct heat rating for the listed Briggs & Stratton engines
- Straight swap for the original plug; easy to fit with a standard spark plug socket
- Helps maintain fuel efficiency and reduce misfires when serviced at recommended intervals
- Suitable for lawn and garden machinery and small contractor equipment powered by B&S engines
Typical Applications:
Widely used on Briggs & Stratton powered lawn mowers, ride‐ons, generators, pressure washers, plate compactors, rotavators, scarifiers, and similar machines. Ideal for routine servicing to restore starting performance, idle quality, and throttle response on equipment used by homeowners, grounds teams, and site crews.
Also known as:
Briggs & Stratton spark plug 691043, B&S OEM 691043 plug, Champion QC12YC spark plug, QC12YC engine plug, EMS spark plug for Briggs & Stratton small engines.
Fits Models:
10D132, 10D135, 10D136, 10D137, 10R232, 110402, 110412, 110432, 110437, 110492, 111432, 113432, 120202, 120212, 120232, 120252, 120292, 120302, 120312, 120317, 120332, 120352, 120412, 120415, 121002, 121003, 121012, 121032, 121052, 121132, 121162, 121212, 121232, 121236, 121237, 121252, 121302, 121307, 121312, 121317, 121332, 121336, 121337, 121352, 121392, 121412, 121432, 121437, 121452, 121492, 121A02, 121A12, 121A32, 122002, 122007, 122012, 122017, 122032, 122037, 122052, 122092, 122232, 122332, 122336, 122337, 122352, 122356, 122362, 122366, 122367, 122432, 122435, 122436, 122437, 122452, 122462, 122466, 122467, 123332, 123336, 123337, 123352, 123432, 123437, 124332, 124432, 126302, 126312, 126317, 126332, 126352, 126392, 126402, 126412, 126432, 126492, 127302, 127312, 127332, 127335, 127337, 127352, 127432, 12A100, 12A102, 12A103, 12A105, 12A106, 12A107, 12A112, 12A113, 12A114, 12A116, 12A117, 12A300, 12A312, 12A313, 12A314, 12A316, 12D100, 12D102, 12D103, 12D113, 12D114, 12D116, 12D132, 12D133, 12D193, 12D194, 12D196, 12D200, 12D202, 12D203, 12D214, 12D296, 12D400, 12D412, 12H132, 12H137, 12H232, 12H332, 12H337, 12H352, 12H362, 12L232, 12L332, 12L336, 12L337, 12R112, 12R113, 12R114, 12R116, 12R193, 12S102, 12S112, 12S132, 12S137, 12S152, 12S157, 12S232, 12S237, 12S252, 12S402, 12S407, 12S412, 12S432, 12S435, 12S436, 12S437, 12S452, 12S492, 12T102, 12T112, 12T132, 12T152, 12T192, 12T202, 12T212, 12T232, 12T252, 12T292, 12T312, 12T402, 12T405, 12T407, 12T412, 12T417, 12T432, 12T452, 12Z112, 12Z314, 130G32, 130G36, 130G37, 130G52, 130G62, 131G32, 13A132, 13A135, 13A136, 13A137, 13D132, 13D135, 13D136, 13D137, 13H132, 13H152, 13H157, 13H332, 13H336, 13H337, 13H352, 13H362, 13L132, 13L152, 13L332, 13L337, 13L356, 13L362, 13R232, 150112, 150117, 150132, 150192, 150202, 150212, 150217, 150232, 150237, 150292, 150297, 150312, 150315, 157102, 157112, 157117, 157202, 157302, 157312, 15A103, 15A104, 15A112, 15A114, 15A193, 15B100, 15B114, 15B194, 15B196, 15C100, 15C102, 15C103, 15C104, 15C105, 15C106, 15C107, 15C112, 15C113, 15C114, 15C117, 15C133, 15C134, 15C194, 15D100, 15D102, 15D104, 15D112, 15D114, 15D134, 15D194, 15R114, 15T112, 15T202, 15T205, 15T212, 15T217, 15T232, 15T237, 15T292, 15T297, 15Z100, 15Z114, 15Z300, 15Z314, 19H232, 19L136, 19L137, 19L232, 201312, 201332, 201412, 201432, 202312, 202332, 202337, 202412, 202432, 202436, 202437, 203432, 204312, 204332, 204412, 204432, 205312, 205332, 205337, 205352, 205357, 205412, 205432, 205437, 205452, 205457, 206432, 207432, 20A114, 20A412, 20A413, 20A414, 20B414, 20E114, 20E214, 20F412, 20G412, 20G414, 20G416, 20H132, 20H137, 20H232, 20H237, 20L132, 20L232, 20L235, 20M113, 20M114, 20M213, 20M214, 20M307, 20M313, 20M314, 20M337, 20M414, 20P214, 20P414, 20S232, 20S237, 20S252, 20S257, 20T212, 20T215, 20T232, 20X314, 210312, 210317, 210332, 210412, 210432, 212312, 212332, 212337, 212412, 212432, 212437, 214707, 215707, 215802, 215807, 215872, 215877, 215902, 215907, 215972, 217707, 217802, 217807, 217877, 217902, 217907, 217972, 217977, 219707, 219802, 219807, 219872, 219902, 219907, 219972, 219977, 21A412, 21A414, 21A416, 21A807, 21A877, 21A902, 21A907, 21A977, 21B707, 21B807, 21B877, 21B907, 21B972, 21B976, 21B977, 21C114, 21C214, 21M107, 21M113, 21M114, 21M214, 21M307, 21M313, 21M314, 21M317, 21M337, 21M414, 21M417, 21P214, 21R507, 21R702, 21R706, 21R707, 21R772, 21R777, 21R877, 21T207, 21T232, 21X314, 21Z114, 21Z314, 280H07, 280J07, 280J77, 281H07, 282H07, 283H07, 284H07, 284H77, 285H77, 286H77, 287776, 287777, 28S707, 28U707, 305447, 310707, 311707, 312707, 312777, 313777, 31A507, 31A607, 31A677, 31A707, 31A777, 31B707, 31C707, 31C777, 31D707, 31D777, 31E507, 31E577, 31E607, 31E677, 31E777, 31F707, 31F777, 31G707, 31G777, 31H777, 31L777, 31M777, 31N707, 31P607, 31P677, 31P707, 31P777, 31P877, 31P977, 31Q507, 31Q677, 31Q777, 31R607, 331707, 331777, 331877, 331977, 33M677, 33M777, 33M977, 356442, 356445, 356447, 35644A, 401577, 4035A7, 4045A7, 405577, 405777, 406577, 406677, 406777, 407577, 407677, 407777, 40G777, 40H777, 40N877, 441577, 441677, 441777, 445577, 445677, 445777, 445877, 446777, 446977, 44L777, 44M777, 44P777, 44Q777, 44Q977, 44S777, 44S977, 49M777, 49M877
Alternate Part Numbers:
BS499950, 499950, 691043, QC12YC
Product Specifications
| L&S Part No. | BS691043 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Briggs & Stratton |
| OEM No. | B691043 |
| Unit of Sale | 1 |
| Applications | 10D132, 10D135, 10D136, 10D137, 10R232, 110402, 110412, 110432, 110437, 110492, 111432, 113432, 120202, 120212, 120232, 120252, 120292, 120302, 120312, 120317, 120332, 120352, 120412, 120415, 121002, 121003, 121012, 121032, 121052, 121132, 121162, 121212, 121232, 121236, 121237, 121252, 121302, 121307, 121312, 121317, 121332, 121336, 121337, 121352, 121392, 121412, 121432, 121437, 121452, 121492, 121A02, 121A12, 121A32, 122002, 122007, 122012, 122017, 122032, 122037, 122052, 122092, 122232, 122332, 122336, 122337, 122352, 122356, 122362, 122366, 122367, 122432, 122435, 122436, 122437, 122452, 122462, 122466, 122467, 123332, 123336, 123337, 123352, 123432, 123437, 124332, 124432, 126302, 126312, 126317, 126332, 126352, 126392, 126402, 126412, 126432, 126492, 127302, 127312, 127332, 127335, 127337, 127352, 127432, 12A100, 12A102, 12A103, 12A105, 12A106, 12A107, 12A112, 12A113, 12A114, 12A116, 12A117, 12A300, 12A312, 12A313, 12A314, 12A316, 12D100, 12D102, 12D103, 12D113, 12D114, 12D116, 12D132, 12D133, 12D193, 12D194, 12D196, 12D200, 12D202, 12D203, 12D214, 12D296, 12D400, 12D412, 12H132, 12H137, 12H232, 12H332, 12H337, 12H352, 12H362, 12L232, 12L332, 12L336, 12L337, 12R112, 12R113, 12R114, 12R116, 12R193, 12S102, 12S112, 12S132, 12S137, 12S152, 12S157, 12S232, 12S237, 12S252, 12S402, 12S407, 12S412, 12S432, 12S435, 12S436, 12S437, 12S452, 12S492, 12T102, 12T112, 12T132, 12T152, 12T192, 12T202, 12T212, 12T232, 12T252, 12T292, 12T312, 12T402, 12T405, 12T407, 12T412, 12T417, 12T432, 12T452, 12Z112, 12Z314, 130G32, 130G36, 130G37, 130G52, 130G62, 131G32, 13A132, 13A135, 13A136, 13A137, 13D132, 13D135, 13D136, 13D137, 13H132, 13H152, 13H157, 13H332, 13H336, 13H337, 13H352, 13H362, 13L132, 13L152, 13L332, 13L337, 13L356, 13L362, 13R232, 150112, 150117, 150132, 150192, 150202, 150212, 150217, 150232, 150237, 150292, 150297, 150312, 150315, 157102, 157112, 157117, 157202, 157302, 157312, 15A103, 15A104, 15A112, 15A114, 15A193, 15B100, 15B114, 15B194, 15B196, 15C100, 15C102, 15C103, 15C104, 15C105, 15C106, 15C107, 15C112, 15C113, 15C114, 15C117, 15C133, 15C134, 15C194, 15D100, 15D102, 15D104, 15D112, 15D114, 15D134, 15D194, 15R114, 15T112, 15T202, 15T205, 15T212, 15T217, 15T232, 15T237, 15T292, 15T297, 15Z100, 15Z114, 15Z300, 15Z314, 19H232, 19L136, 19L137, 19L232, 201312, 201332, 201412, 201432, 202312, 202332, 202337, 202412, 202432, 202436, 202437, 203432, 204312, 204332, 204412, 204432, 205312, 205332, 205337, 205352, 205357, 205412, 205432, 205437, 205452, 205457, 206432, 207432, 20A114, 20A412, 20A413, 20A414, 20B414, 20E114, 20E214, 20F412, 20G412, 20G414, 20G416, 20H132, 20H137, 20H232, 20H237, 20L132, 20L232, 20L235, 20M113, 20M114, 20M213, 20M214, 20M307, 20M313, 20M314, 20M337, 20M414, 20P214, 20P414, 20S232, 20S237, 20S252, 20S257, 20T212, 20T215, 20T232, 20X314, 210312, 210317, 210332, 210412, 210432, 212312, 212332, 212337, 212412, 212432, 212437, 214707, 215707, 215802, 215807, 215872, 215877, 215902, 215907, 215972, 217707, 217802, 217807, 217877, 217902, 217907, 217972, 217977, 219707, 219802, 219807, 219872, 219902, 219907, 219972, 219977, 21A412, 21A414, 21A416, 21A807, 21A877, 21A902, 21A907, 21A977, 21B707, 21B807, 21B877, 21B907, 21B972, 21B976, 21B977, 21C114, 21C214, 21M107, 21M113, 21M114, 21M214, 21M307, 21M313, 21M314, 21M317, 21M337, 21M414, 21M417, 21P214, 21R507, 21R702, 21R706, 21R707, 21R772, 21R777, 21R877, 21T207, 21T232, 21X314, 21Z114, 21Z314, 280H07, 280J07, 280J77, 281H07, 282H07, 283H07, 284H07, 284H77, 285H77, 286H77, 287776, 287777, 28S707, 28U707, 305447, 310707, 311707, 312707, 312777, 313777, 31A507, 31A607, 31A677, 31A707, 31A777, 31B707, 31C707, 31C777, 31D707, 31D777, 31E507, 31E577, 31E607, 31E677, 31E777, 31F707, 31F777, 31G707, 31G777, 31H777, 31L777, 31M777, 31N707, 31P607, 31P677, 31P707, 31P777, 31P877, 31P977, 31Q507, 31Q677, 31Q777, 31R607, 331707, 331777, 331877, 331977, 33M677, 33M777, 33M977, 356442, 356445, 356447, 35644A, 401577, 4035A7, 4045A7, 405577, 405777, 406577, 406677, 406777, 407577, 407677, 407777, 40G777, 40H777, 40N877, 441577, 441677, 441777, 445577, 445677, 445777, 445877, 446777, 446977, 44L777, 44M777, 44P777, 44Q777, 44Q977, 44S777, 44S977, 49M777, 49M877 |
| Machine Type | Engines |
| Fits Brands | Briggs & Stratton |
